linux-kernel - Re: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage based on semi-formal proof"

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20110526061348.GA26775@elte.hu>
Date:	Thu, 26 May 2011 08:13:48 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Yinghai Lu <yinghai@...nel.org>, linux-kernel@...r.kernel.org,
	mingo@...hat.com, hpa@...or.com, tglx@...utronix.de
Subject: Re: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage based
 on semi-formal proof"


* Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:

> rcu: Start RCU kthreads in TASK_INTERRUPTIBLE state
> 
> Upon creation, kthreads are in TASK_UNINTERRUPTIBLE state, which can
> result in softlockup warnings.  Because some of RCU's kthreads can
> legitimately be idle indefinitely, start them in TASK_INTERRUPTIBLE
> state in order to avoid those warnings.
> 
> Suggested-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

this should also solve load average artifacts - do not 
TASK_UNINTERRUPTIBLE tasks skew the load upwards?

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/